In a chemical change, the actual chemical makeup of a material is changed, and you cannot get the original material back without another chemical change. Burning wood is an example--you end up with ash and various gases (with heat as a byproduct), but you cannot undo the change to get your wood back.
In January 2010 the Explorers investigated the difference between “physical changes” and “chemical changes,” demonstrating a chemical change with a combination of plain old glue, water, and a powder known as borax.
The Explorers started by discussing the difference between the two types of changes that a substance can undergo—an especially pertinent topic since the fourth graders have been learning about that very thing in science class.
OH - Dayton / Wright-Patterson Air Force Base
- Few clouds
- Temperature: 53.6 °F / 12 °C
- Wind: South-Southeast, 5.8 mph
- Pressure: 1006 hPa
- Rel. Humidity: 88 %
- Visibility: 16.1 km
Fri, 03/12/2010 - 00:55